3940347 has 4 divisors (see below), whose sum is σ = 5253800. Its totient is φ = 2626896.

The previous prime is 3940319. The next prime is 3940351. The reversal of 3940347 is 7430493.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 3940347 - 2⁸ = 3940091 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3940367) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656722 + ... + 656727.

It is an arithmetic number, because the mean of its divisors is an integer number (1313450).

Almost surely, 2^3940347 is an apocalyptic number.

3940347 is a deficient number, since it is larger than the sum of its proper divisors (1313453).

3940347 is a wasteful number, since it uses less digits than its factorization.

3940347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313452.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 3940347 is about 1985.0307302407. The cubic root of 3940347 is about 157.9470393454.

The spelling of 3940347 in words is "three million, nine hundred forty thousand, three hundred forty-seven".